Hi Adrian - good to see you back here again.
I bought one ages ago and in the end found it awkward. Mainly because trying to use it down low as I wanted - it kept riding up!!! So - it was comfortable in itself but not with it's changing position.
Mine was black - but must say if it was skin toned then I'd try it as some folks do as a chest band. I think that could work well. I guess the black would be OK under a real dark shirt but nothing light in color.
fed_wif_a_sig is a great exponent of the UC Comfort BTW - this was a page on it a while back